This thesis summarizes the results of a series of experiments, from test tube up to field study scale, performed to increase the understanding of solar radiation effects on decomposition and microbial decomposers of plant litter in stagnant water of littoral zones. In conclusion, I suggest that fungi play a significant role in the decomposition of plant litter submersed in lakes, and that their d

Popular Abstract in Swedish På grund av den förutspådda energi krisen som föranleds av att oljan tar slut, är det viktigt att söka efter alternativa energikällor. Att utnyttja solljuset via en artificiell fotosyntes är en intressant möjlighet. Det långsiktiga målet för forskning på detta område är att bygga molekylära och/eller fasta material som kan använda solljus för att dela vatten i dess bestDue to the predicted energy crisis when fossil fuels will be exhausted it is important to search for alternative energy sources. Utilizing sunlight via artificial photosynthesis is an interesting possibility. The long-term goal for research in this area is to design and build molecular and/or solid state systems that can use sunlight to split water and produce fuel (e.g. hydrogen). Nature tells us

Endocrine-disrupting compounds (EDCs) such as hormones and certain pharmaceuticals (i.e. birth control pills, oestrogen replacement products and other steroids) can interfere with the regulatory systems of humans and wildlife. Many of these compounds are excreted by humans and released with sewage. Pesticides and various industrial chemicals such as dioxin and PCBs are also EDCs that often find th

Diskussion om andra världskriget på svensk film med utgångspunkt i fyra filmer: Gränsen, En fiende att dö för, Simon och ekarna samt Dom över död man.

With the advent of massive online encyclopedic corpora such as Wikipedia, it has become possible to apply a systematic analysis to a wide range of documents covering a significant part of human knowledge. Using semantic parsers, it has become possible to extract such knowledge in the form of propositions (predicate―argument structures) and build large proposition databases from these documents. Th

August Palm 1881

Syftet med denna arbetsrapport är att komplementera tidigare arbete om fuktöverföring vid regenerativ värmeväxling med en ren metallrotor genom att undersöka hur fuktreglering kan ske med förvärmning av uteluft eller förvärmning av frånluft. Följande fyra arbetsrapporter beskiver en beräkningsmodell för en rotor och olika former av fuktreglering. - TVIT—10/7048 Fuktöverföring vid regenerativ

A materialized text shows many faces in the mirror of time. In every printing, how ordinary it may seem, the graphic structure given carries meaning over and below the linguistic. Examples from different editions of the Bible and of Swedish literature demonstrate how the face of a text has been adapted to changing reading habits and literary taste. Scholarly text editors though have generally disr

In his book Visual thinking, Arnheim (1969) writes: ... cognitive operations called thinking are not the privilege of mental processes above and beyond perception but the essential ingredients of perception itself. I am referring to such operations as active exploration, selection, grasping of essentials, simplification, abstraction, analysis and synthesis, completion, correction, comparison, prob